Former U.S. Sen. Bob Graham (D-Fla.) on Why He's Calling for Release of Still-Secret Section of 9/11 Investigation

The co-chair of the congressional inquiry into 9/11, retired U.S. Sen. Bob Graham (D-Fla.), tells Larry why he's calling for the release of a still-secret section of the 9/11 investigation, which he says links the Saudi government to the hijackers.